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A proof-of-concept experimental study for vacuum-driven anaerobic biosolids fermentation using the IntensiCarb technology.
Okoye, Frances; Kakar, Farokh Laqa; Elbeshbishy, Elsayed; Bell, Kati; Muller, Christopher; Jimenez, Jose; Al-Omari, Ahmed; Santoro, Domenico; Jang, Eunkyung; Walton, John; Bahreini, Gholamreza; Zaman, Masuduz; Nakhla, George; Hazi, Ferenc; Takacs, Imre; Murthy, Sudhir; Rosso, Diego.
Afiliação
  • Okoye F; Environmental Research for Resource Recovery Group, Department of Civil Engineering, Ryerson University, Toronto, Canada.
  • Kakar FL; Environmental Research for Resource Recovery Group, Department of Civil Engineering, Ryerson University, Toronto, Canada.
  • Elbeshbishy E; Environmental Research for Resource Recovery Group, Department of Civil Engineering, Ryerson University, Toronto, Canada.
  • Bell K; Brown and Caldwell, Walnut Creek, California, USA.
  • Muller C; Brown and Caldwell, Walnut Creek, California, USA.
  • Jimenez J; Brown and Caldwell, Walnut Creek, California, USA.
  • Al-Omari A; Brown and Caldwell, Walnut Creek, California, USA.
  • Santoro D; USP Technologies, London, Canada.
  • Jang E; USP Technologies, London, Canada.
  • Walton J; USP Technologies, London, Canada.
  • Bahreini G; Department of Civil and Environmental Engineering, Western University, London, Canada.
  • Zaman M; Department of Civil and Environmental Engineering, Western University, London, Canada.
  • Nakhla G; Department of Civil and Environmental Engineering, Western University, London, Canada.
  • Hazi F; Dynamita, Sigale, France.
  • Takacs I; Dynamita, Sigale, France.
  • Murthy S; NEWHub Corp, Herndon, Virginia, USA.
  • Rosso D; Civil and Environmental Engineering Department, University of California, Irvine, California, USA.
Water Environ Res ; 94(3): e10694, 2022 Feb 11.
Article em En | MEDLINE | ID: mdl-35243725
This study demonstrates the potential of an innovative anaerobic treatment technology for municipal biosolids (IntensiCarb), which relies on vacuum evaporation to decouple solids and hydraulic retention times (SRT and HRT). We present proof-of-concept experiments using primary sludge and thickened waste activated sludge (50-50 v/v mixture) as feed for fermentation and carbon upgrading with the IntensiCarb unit. IntensiCarb fully decoupled the HRT and SRT in continuously stirred anaerobic reactors (CSAR) to achieve two intensification factors, that is, 1.3 and 2, while keeping the SRT constant at 3 days (including in the control fermenter). The intensified CSARs were compared to a conventional control system to determine the yields of particulate hydrolysis, VFA production, and nitrogen partitioning between fermentate and condensate. The intensified CSAR operating at an intensification factor 2 achieved a 65% improvement in particulate solubilization. Almost 50% of total ammonia was extracted without pH adjustment, while carbon was retained in the fermentate. Based on these results, the IntensiCarb technology allows water resource recovery facilities to achieve a high degree of plant-wide intensification while partitioning nutrients into different streams and thickening solids. PRACTITIONER POINTS: The IntensiCarb reactor can decouple hydraulic (HRT) and solids (SRT) retention times in anaerobic systems while also increasing particulate hydrolysis and overall plant capacity. Using vacuum as driving force of the IntensiCarb technology, the system could achieve thickening, digestion, and partial dewatering in the same unit-thus eliminating the complexity of multi-stage biosolids treatment lines. The ability to partition nutrients between particulate, fermentate, and condensate assigns to the IntensiCarb unit a key role in recovery strategies for value-added products such as nitrogen, phosphorus, and carbon, which can be recovered separately and independently.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Revista: Water Environ Res Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Canadá

Texto completo: 1 Base de dados: MEDLINE Idioma: En Revista: Water Environ Res Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Canadá